Good Science Victorian Curriculum Year 7

CHAPTER 8: FORCES
FINAL CHALLENGE
1 Describe what a force is in your own words and identify the three types of forces.
2 All forces have two properties or characteristics. What are they?
Level 1
3 Define friction in your own words.
4 Explain what gravity is and list the two factors that affect its strength.
50xp
5 Examine surfaces that are designed to either increase or decrease friction;
for example, the sole of a running shoe, a tyre tread or the hinge on a door.
What can you observe about the differences in these surfaces?
6 Make a list of ways you use simple machines such as pulleys or ramps in
your everyday activities to make them easier.
Level 2
100xp
7 From the list below, identify the examples of unbalanced forces.
• A phone sitting on a table
• A bike picking up speed as it rolls down a hill
• A car braking
• A duck sitting still on the surface of a dam
• A ball bouncing off a wall
8 Compare the motion of balanced forces compared to unbalanced forces
when acting on the same object.
9 Explain how mass and weight are different and give an example.
Level 3
150xp
10 In two minutes, brainstorm as many ways as you can to use a simple machine to
lift a heavy crate of books from the ground floor to the first floor of your school.
a Which simple machine from your list would make the task easiest for you?
b Draw a plan of your simple machine that you could share with an engineer.
11 From personal experience, evaluate how well different types of shoes reduce
the force on your feet when running.
Level 4
200xp
12 Write a short paragraph about what your life would be like if you could turn
friction on and off.
13 Create a sketch of a shoe, helmet or car that would be perfect at reducing
the impact of forces. Label features on your sketch that demonstrate this.
Level 5
300xp
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